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Inventory (Tables)
6 Months Ended
Jun. 30, 2014
Inventory Tables  
Inventory

Inventory is as follows at June 30, 2014 and December 31, 2013 (in thousands):

          June 30,         December 31,
      2014     2013
Raw materials   $ 30,866    $ 29,330 
Finished goods     1,814      705 
Total inventory   $ 32,680    $ 30,035